Wikipedia in a Death Spiral?

This fellow seems to think wikipedia is doomed by its core open-access architecture, that it will fall prey to marketers / spammers like the Open Directory Project.

http://informationweek.com/news/showArticle.jhtml?articleID=196601766

I think Apotheon works there, anyone else have any opinions how this can be avoided? It must be a worthwhile site if Iran has now banned it. I have noticed on my occasional references to it that articles have been restored and locked to prevent vandalism.